November 2021 0 2 Report
к окруж­но­сти с цен­тром в точке О про­ве­де­ны ка­са­тель­ная AB и се­ку­щая AO. Най­ди­те ра­ди­ус окруж­но­сти, если AB = 12 см, AO = 13 см.
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